Flat-top cells cannot be used in the light, given the flat contacts in the head...
There was an intermittent contact issue early on with one well on my sample. This manifested as either reduced runtime (i.e., that well was not engaged on one runtime test), or reduced charging time (i.e., that well was not recharged on one 18650 charge cycle attempt). I have thoroughly cleaned all contact surfaces, and I have not seen a re-occurrence of the problem on the last half dozen or so runs or charge cycles.
Although magnets can indeed help bridge the contacts, they are not typically recommended (due to their ability to dislodge). Shouldn't be much of a risk in a light with a carrier like this. However, I definitely recommend against them in a single-cell light (i.e., if the battery shifts to the metal side wall, you can short the cell through the body).Ultimately, I got my flat-top Panasonic 18650B's working by attaching two (2) 1/16 inch thick magnetic disks to each battery.
Yes, it is a great light - straightforward interface, and great beam.Several months of ownership of an SR52 on now and I have got to say that it is still one of the best LED light purchases I have ever made. The beam is so big and such a concentrated hot spot that using it even in medium mode in my neighborhood at night I find myself accidentally lighting up houses half way down the street. Last thing I need is the local cops at my door so the mighty SR52 only comes out on local roadtrips at night.
:welcome:Firstly do i have to buy rechargeable 18650's or does it automatically recharge normal ones ? And is it button top one's required ? Sounds daft but I've only ever used D dell batteries you see.